Structural and defect chemistry guidelines for Sr(V,Nb)O3-based SOFC anode materials

2015 ◽  
Vol 17 (16) ◽  
pp. 10749-10758 ◽  
Author(s):  
J. Macías ◽  
A. A. Yaremchenko ◽  
D. P. Fagg ◽  
J. R. Frade
Keyword(s):  
Anode Materials ◽  
Perovskite Phase ◽  
Electronic Conductivity ◽  
Stability Domain ◽  
Defect Chemistry ◽  
High Electronic Conductivity ◽  
Sofc Anode ◽  
The Stability

Substitution of Nb into SrVO3 is demonstrated to expand the stability domain of the cubic perovskite phase and to suppress unfavorable thermochemical expansion, while preserving sufficiently high electronic conductivity required for SOFC anode materials.

The stability and mixed conductivity in La and Fe doped SrTiO3 in the search for potential SOFC anode materials

2001 ◽  
Vol 21 (10-11) ◽  
pp. 1831-1835 ◽  
Author(s):  
D.P. Fagg ◽  
V.V. Kharton ◽  
A.V. Kovalevsky ◽  
A.P. Viskup ◽  
E.N. Naumovich ◽  
...  
Keyword(s):  
Anode Materials ◽  
Mixed Conductivity ◽  
Sofc Anode ◽  
The Stability

Metal Chloride-Graphite Compounds as Cathode and Anode Materials For Batteries

1982 ◽  
Vol 20 ◽  
Author(s):  
Serge Flandrois ◽  
Francis Baron
Keyword(s):  
Beneficial Effect ◽  
Anode Materials ◽  
Electrode Materials ◽  
Electronic Conductivity ◽  
Nickel Chloride ◽  
Metal Chloride ◽  
Metal Chlorides ◽  
Alkaline Batteries ◽  
High Electronic Conductivity ◽  
Graphite Intercalation

ABSTRACTGraphite intercalation compounds can be used as electrode materials in batteries owing to the high electronic conductivity of carbon layers and the easy diffusion of ions between the layers. Moreover intercalation has the beneficial effect of impeding some parasitic reactions detrimental to good electrode reversibility. After a brief review of recent proposals, emphasis is given to transition metal chlorides. It is shown that, besides the nickel chloride-graphite compound proposed two years ago as a cathode material for alkaline batteries, other metal chlorides intercalated into graphite are excellent cathode or anode materials.

Enhanced stability of perovskite-like SrVO3-based anode materials by donor-type substitutions

2016 ◽  
Vol 4 (26) ◽  
pp. 10186-10194 ◽  
Author(s):  
Javier Macías ◽  
Aleksey A. Yaremchenko ◽  
Jorge R. Frade
Keyword(s):  
Phase Stability ◽  
Anode Materials ◽  
Stability Domain ◽  
Partial Pressures ◽  
Donor Type ◽  
Sofc Anode ◽  
Enhanced Stability

Phase stability domain of SrVO3-based SOFC anode materials is expanded towards higher oxygen partial pressures by donor-type substitutions into strontium and/or vanadium sublattices.

scholarly journals The Development of the Intermediate SnO2–Sb2O5 Layer on Titanium Substrate for Oxygen Evolution Anodes in Seawater Electrolysis

1970 ◽  
Vol 23 ◽  
pp. 54-64
Author(s):  
Jagadeesh Bhattarai
Keyword(s):  
Oxygen Evolution ◽  
Intermediate Layer ◽  
Electronic Conductivity ◽  
Titanium Substrate ◽  
Coating Solution ◽  
High Electronic Conductivity ◽  
Initial Oxygen ◽  
Co2 Recycling ◽  
The Stability ◽  
Seawater Electrolysis

An attempt is made to replace the use of IrO2 by SnO2–Sb2O5 in the intermediate layer which is necessary to avoid the growth of insulating titanium oxide on the titanium substrate for oxygen evolution γ-MnO2 type Mn1-x-yMoxSnyO2+x anodes in seawater electrolysis. The manganese–molybdenum–tin triple oxides, Mn1-x-yMoxSnyO2+x, prepared by anodic deposition on the SnO2–Sb2O5-coated titanium substrate from MnSO4, Na2MoO4 and SnCl4 solutions showed around 98.6% initial oxygen evolution efficiency at a current density of 1000 Am-2 in 0.5 M NaCl of pH 1 at room temperature. In order to increase the stability of the anodes, coating at various times to form the intermediate SnO2–Sb2O5 layer with sufficient thickness on titanium substrate, was performed. The Mn1-x-yMoxSnyO2+x electrodes deposited on the intermediate layer formed from seven times coating showed about 98% oxygen evolution efficiency after 20 h electrolysis. A small addition of Sb2O5 to the intermediate layer (that is, Sb5+/Sn4+ = 0.124 in the coating solution) seems to be more effective to replace the use of IrO2 for high electronic conductivity and activity of oxygen evolution in seawater electrolysis. The formation of the double oxides of the intermediate SnO2–Sb2O5 layer after seven times coating seemed responsible for both high conductivity and stability of the Mn1-x-yMoxSnyO2+x anodes.Keywords: CO2 recycling, oxygen evolution electrode, intermediate SnO2–Sb2O5 layer, seawater electrolysis, titanium substrate.DOI: 10.3126/jncs.v23i0.2097J. Nepal Chem. Soc., Vol. 23, 2008/2009 Page: 54-64 

scholarly journals Exploring the Structural Competition between the Black and the Yellow Phase of CsPbI3

Nanomaterials ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 1282
Author(s):  
Ioannis Deretzis ◽  
Corrado Bongiorno ◽  
Giovanni Mannino ◽  
Emanuele Smecca ◽  
Salvatore Sanzaro ◽  
...  
Keyword(s):  
Perovskite Phase ◽  
Low Cost ◽  
Δ Phase ◽  
Nanocrystalline Structures ◽  
Halide Perovskites ◽  
The Stability ◽  
Structural Competition ◽  
Lead Halide ◽  
Main Candidate ◽  
Spontaneous Phase

The realization of stable inorganic perovskites is crucial to enable low-cost solution-processed photovoltaics. However, the main candidate material, CsPbI3, suffers from a spontaneous phase transition at room temperature towards a photo-inactive orthorhombic δ-phase (yellow phase). Here we used theoretical and experimental methods to study the structural and electronic features that determine the stability of the CsPbI3 perovskite. We argued that the two physical characteristics that favor the black perovskite phase at low temperatures are the strong spatial confinement in nanocrystalline structures and the level of electron doping in the material. Within this context, we discussed practical procedures for the realization of long-lasting inorganic lead halide perovskites.

scholarly journals STABILITY ANALYSIS AND SIMULATION OF N-CLASS RETRIAL SYSTEM WITH CONSTANT RETRIAL RATES AND POISSON INPUTS

2014 ◽  
Vol 31 (02) ◽  
pp. 1440002 ◽  
Author(s):  
K. AVRACHENKOV ◽  
E. MOROZOV ◽  
R. NEKRASOVA ◽  
B. STEYAERT
Keyword(s):  
Queueing System ◽  
Stability Domain ◽  
Single Server ◽  
Retrial Queueing System ◽  
Retrial Queueing ◽  
Single Orbit ◽  
Transmission Control Protocols ◽  
Regenerative Approach ◽  
The Stability ◽  
Multi Access

In this paper, we study a new retrial queueing system with N classes of customers, where a class-i blocked customer joins orbit i. Orbit i works like a single-server queueing system with (exponential) constant retrial time (with rate [Formula: see text]) regardless of the orbit size. Such a system is motivated by multiple telecommunication applications, for instance wireless multi-access systems, and transmission control protocols. First, we present a review of some corresponding recent results related to a single-orbit retrial system. Then, using a regenerative approach, we deduce a set of necessary stability conditions for such a system. We will show that these conditions have a very clear probabilistic interpretation. We also performed a number of simulations to show that the obtained conditions delimit the stability domain with a remarkable accuracy, being in fact the (necessary and sufficient) stability criteria, at the very least for the 2-orbit M/M/1/1-type and M/Pareto/1/1-type retrial systems that we focus on.

Quantum transport, electronic properties and molecular adsorptions in graphene

2021 ◽  
Vol 35 (08) ◽  
pp. 2130001
Author(s):  
Yoshitaka Fujimoto
Keyword(s):  
Electronic Properties ◽  
Quantum Transport ◽  
Density Functional ◽  
Field Effect Transistors ◽  
Electronic Conductivity ◽  
Volume Ratio ◽  
Functional Study ◽  
Sensor Applications ◽  
Sensing Applications ◽  
High Electronic Conductivity

Molecular sensor applications are used in different fields including environmental monitoring and medical diagnosis. Graphene, a single atomic layer consisting of the hexagonally arranged carbon material, is one of the most promising materials for ideal channels in field-effect transistors to be used as electronic sensing applications owing to its lightweight, mechanical robustness, high electronic conductivity and large surface-to-volume ratio. This paper provides a review of molecular adsorptions, electronic properties and quantum transport of graphene based on the first-principles density-functional study. The adsorption properties of environmentally polluting or toxic molecules and electronic transport of graphene are revealed. The possibility of detecting these molecules selectively is also discussed for designing the graphene-based sensor applications.

Analytical and Experimental Flutter Analysis of a Typical Wing Section Carrying a Flexibly Mounted Unbalanced Engine

2019 ◽  
Vol 19 (02) ◽  
pp. 1950013 ◽  
Author(s):  
A. S. Mirabbashi ◽  
A. Mazidi ◽  
M. M. Jalili
Keyword(s):  
Stability Domain ◽  
Governing Equations ◽  
Lagrange Equations ◽  
Wing Section ◽  
Unbalanced Force ◽  
Engine Thrust ◽  
Finite State Model ◽  
Flutter Analysis ◽  
Finite State ◽  
The Stability

In this paper, both experimental and analytical flutter analyses are conducted for a typical 5-degree of freedon (5DOF) wing section carrying a flexibly mounted unbalanced engine. The wing flexibility is simulated by two torsional and longitudinal springs at the wing elastic axis. One flap is attached to the wing section by a torsion spring. Also, the engine is connected to the wing by two elastic joints. Each joint is simulated by a spring and damper unit to bring the model close to reality. Both the torsional and longitudinal motions of the engine are considered in the aeroelastic governing equations derived from the Lagrange equations. Also, Peter’s finite state model is used to simulate the aerodynamic loads on the wing. Effects of various engine parameters such as position, connection stiffness, mass, thrust and unbalanced force on the flutter of the wing are investigated. The results show that the aeroelastic stability region is limited by increasing the engine mass, pylon length, engine thrust and unbalanced force. Furthermore, increasing the damping and stiffness coefficients of the engine connection enlarges the stability domain.

MnCo2O4 decorated Magnéli phase titanium oxide as a carbon-free cathode for Li–O2 batteries

2017 ◽  
Vol 5 (37) ◽  
pp. 19991-19996 ◽  
Author(s):  
Xuecheng Cao ◽  
Zhihui Sun ◽  
Xiangjun Zheng ◽  
Jinghua Tian ◽  
Chao Jin ◽  
...  
Keyword(s):  
Titanium Oxide ◽  
Electrocatalytic Activity ◽  
High Performance ◽  
Electronic Conductivity ◽  
Synergistic Interaction ◽  
High Electronic Conductivity ◽  
Magnéli Phase ◽  
First Time ◽  
Magneli Phase

The application of MnCo2O4 (MCO) decorated Ti4O7 as a carbon-free cathode for Li–O2 batteries is reported for the first time. The high performance of Ti4O7/MCO cathode is attributed to the high electronic conductivity of Ti4O7, the high electrocatalytic activity of MCO and the synergistic interaction between Ti4O7 and MCO toward ORR and OER.

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